Lucene search

K
vulnrichmentGitHub_MVULNRICHMENT:CVE-2023-40015
HistorySep 04, 2023 - 5:39 p.m.

CVE-2023-40015 Vyper: reversed order of side effects for some operations

2023-09-0417:39:12
CWE-670
GitHub_M
github.com
vyper
pythonic smart contract language
side effects
compiler
expressions
bitwise operators
raw_call
state modifying
dynamic array

CVSS3

3.7

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

AI Score

6.4

Confidence

Low

SSVC

Exploitation

none

Automatable

no

Technical Impact

partial

Vyper is a Pythonic Smart Contract Language. For the following (probably non-exhaustive) list of expressions, the compiler evaluates the arguments from right to left instead of left to right. unsafe_add, unsafe_sub, unsafe_mul, unsafe_div, pow_mod256, |, &, ^ (bitwise operators), bitwise_or (deprecated), bitwise_and (deprecated), bitwise_xor (deprecated), raw_call, <, >, <=, >=, ==, !=, in, not in (when lhs and rhs are enums). This behaviour becomes a problem when the evaluation of one of the arguments produces side effects that other arguments depend on. The following expressions can produce side-effect: state modifying external call , state modifying internal call, raw_call, pop() when used on a Dynamic Array stored in the storage, create_minimal_proxy_to, create_copy_of, create_from_blueprint. This issue has not yet been patched. Users are advised to make sure that the arguments of the expression do not produce side effects or, if one does, that no other argument is dependent on those side effects.

CVSS3

3.7

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

AI Score

6.4

Confidence

Low

SSVC

Exploitation

none

Automatable

no

Technical Impact

partial

Related for VULNRICHMENT:CVE-2023-40015